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Finding the Fourth Proportional to 322,318.56, 483,433.20 and 85,680.48

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Solution

The fourth proportional to 322,318.56, 483,433.20 and 85,680.48 is: 128,508.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    322,318.56 : 483,433.20 = 85,680.48 : x
  2. Step 2: Convert to fraction form
    322,318.56/483,433.20 = 85,680.48/x
  3. Step 3: Cross multiply
    322,318.56x = 483,433.20 × 85,680.48
  4. Step 4: Simplify right side
    322,318.56x = 41,420,788,623.94
  5. Step 5: Solve for x
    x = 41,420,788,623.94/322,318.56
  6. Step 6: Final answer
    x = 128,508.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.